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Local Satellite Telecommanding Capabilities
3.5.5.
Using the Cortex MCS software, it is possible to locally edit, store, retrieve and uplink telecommand messages at
the front panel of the CORTEX CRT Quantum. This function is password-protected (separate password for
telecommand database update and for TC transmission). It is highly recommended to restrict this capability to
tests purposes only (TCU programmed in TC Simulation mode). At delivery, the TC database may contain TC
requests and instructions that have been used for factory acceptance of the unit. It is then the Customer's
responsability to update the database in accordance with mission requirements. Refer to the Cortex MCS User's
Manual for more details.
Telecommand Socket Closure
3.5.6.
In case of socket closure on the Telecommand port, the CORTEX CRT Quantum automatically flushes satellite
TC requests and TC instructions awaiting in the telecommand input queue and IDLE generation is inhibited.
TC Watchdog
3.5.7.
The TC watchdog mechanism consists in:
Monitoring the TCP-IP activity on the TC port,
Disconnecting the TC client and dropping the IF carrier in case of abnormal activity on the TC port.
3.5.7.1. Activation/Inhibition of the TC Watchdog Mechanism
The TC watchdog mechanism can be activated or inhibited via a registry key (see Section 4.2.8.5.4).
The TC watchdog mechanism is inhibited by setting the registry key to 0.
The TC watchdog mechanism is activated by setting the registry key to a positive value (> 0).
The TC watchdog mechanism remains inhibited (whatever the setting of the registry key) as long as
the TC port is unused (no TC Client connected).
3.5.7.2. TC Watchdog Mechanism
TC watchdog timer: a timer is started each time a TC client opens a connection to the TC port.
The TC watchdog time-out value can be adjusted via the RF Fall Time parameter (TCU).
The TC watchdog timer is re-started each time a valid TCP-IP message (TC request or TC
instruction: see Annex 1, STI 100013_TTC) is received on the TC port.
The TC watchdog timer is not re-started when an invalid (bad syntax) or unidentified message is
received on the TC port.
The RF Fall Time parameter can be dynamically adjusted while the TC watchdog timer is running.
TC connection closure: the connection to the TC port is automatically released when the TC
watchdog time-out is reached.
IF carrier ON/OFF: the IF carrier is automatically dropped when the connection to the TC port is
released. Note that the TC watchdog mechanism is not be used to activate the IF carrier.
© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
This document is the property of
It cannot be duplicated or distributed without expressed written consent.
Safran Data Systems
.
Ref.
DTU 100042
Is.Rev.
5.17
Date:
Dec.
03, 2021Sept. 30, 2021
Page 143
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